Heat Stress (WBGT and Heat Index)

Formula and source

NWS Heat Index = polynomial of T_db (°F) and RH (%) (Steadman regression); WBGT estimate from public OSHA heat-illness work-rest table; OSHA-style work / rest cycle by exertion.

NWS Heat Index polynomial by name; OSHA Heat Illness Prevention work-rest table by name.

Audience

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Posture

Rough Logic answers the math question the working professional asks on the job. The site is a calm, fast, ad-free, account-free, ever-free reference. It does not interpret code. It does not replace the licensed professional. It does not store your inputs. The Authority Having Jurisdiction governs all installations and inspections.